fielddisableattr

  
[pdocrud table="wpyv_users"  render="insertform"]
[pc_func fielddataattr colname="display_name" disabled="disabled"][/pc_func]
[/pdocrud]

Or

  
$pdocrud = new PDOCrud();
$pdocrud->fieldDataAttr("customer_id", array("disabled"=>"disabled"));
echo $pdocrud->dbTable("orders")->render(insertform);